无论\detokenize是应用于字体包-还是--在其下，结果都是相同的。fontencT1
\documentclass[border=10pt]{standalone}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\begin{document}
\begin{tabular}{lcl}
Command & applied to & result \\\hline
Verb & two minus signs & \verb=--= \\
Detokenize & two minus signs & \ttfamily\detokenize{--} \\
Detokenize & one minus sing & \ttfamily\detokenize{-} \\
Detokenize & three minus signs & \ttfamily\detokenize{---} \\
\end{tabular}
\end{document}
这就像是\detokenize在将其魔法应用于其论点之前允许某种扩展发生。但我认为这恰恰是它不应该做的。
有人能解释一下这里发生了什么吗？为什么会有区别\verb？
答案1
使用 xelatex 和 lualatex 时，无论是否使用，我都会得到相同的结果，\detokenize这与-默认情况下 catcode 12 的预期一致，因此\detokenize在这种情况下只返回与其参数相同的标记。连字不是通过 catcode 技巧完成的。
\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\begin{document}
\begin{tabular}{lcl}
Command & applied to & result \\\hline
Verb & two minus signs & \verb=--= \\
Detokenize & two minus signs & \ttfamily\detokenize{--} \\
Detokenize & one minus sing & \ttfamily\detokenize{-} \\
Detokenize & three minus signs & \ttfamily\detokenize{---} \\
\end{tabular}
\begin{tabular}{lcl}
Command & applied to & result \\\hline
Verb & two minus signs & \verb=--= \\
Detokenize & two minus signs & \detokenize{--} \\
Detokenize & one minus sing & \detokenize{-} \\
Detokenize & three minus signs & \detokenize{---} \\
\end{tabular}
\begin{tabular}{lcl}
Command & applied to & result \\\hline
Verb & two minus signs & \verb=--= \\
Detokenize & two minus signs & \ttfamily{--} \\
Detokenize & one minus sing & \ttfamily{-} \\
Detokenize & three minus signs & \ttfamily{---} \\
\end{tabular}
\begin{tabular}{lcl}
Command & applied to & result \\\hline
Verb & two minus signs & \verb=--= \\
Detokenize & two minus signs & {--} \\
Detokenize & one minus sing & {-} \\
Detokenize & three minus signs & {---} \\
\end{tabular}
\end{document}